In addition to the regular outside rear view mirrors, what type of mirror must be installed on cab-over or forward control type school bus?
A: Convex mirrors at the bottom of the side mirrors
B: A convex mirror at the front of the vehicle so that you can view passengers crossing in front
C: A mirror to give a view of the entrance door to the school bus so that you may observe passengers alighting and boarding the bus
D: All of the above
E: b and c are correct